18 — Jail Break Tunnel

For most players the hardest sub-chapter yet — and the first whose boss is recruitable: beat The Great Escaper for a 30% chance at Ururun Wolf.

Every stage except Prison Sentence can be a real fight, with Sin and Punishment and Harry Tunnel arguably the toughest at higher difficulties. Dead Falls introduces Sir Metal Seal — a Metal with high attack, decent range, and far more health than earlier Metals, which effectively mandates a ranged Critical hitter like Space Cat.

The finale, The Great Escaper, debuts Ururun Wolf: very high HP and long range, balanced by frequent knockbacks and modest hits. She matters beyond the fight — this sub-chapter starts the Legend Cats trend, with a 30% drop chance to recruit Ururun Wolf on clear (100% with a Treasure Radar). The first 'beat the boss, get the boss' moment in Stories of Legend.